In a clip from his interview with Diane Sawyer, Bruce Jenner expresses concern for his family members

Bruce Jenner is concerned about the effects his decisions might have on his family, according to a new clip promoting his upcoming TV interview with Diane Sawyer.

"I can't let myself hurt them," he says of his family, separately describing them or possibly their opinions as "the only ones I'm concerned with."

In the chat that is set to air Friday, Jenner is expected to discuss his as-yet-unconfirmed transition from male to female.

"My whole life has been getting me ready for this," the 65-year-old told Sawyer in a previously released clip from the interview.

The gold-medal-winning 1976 Olympic decathlete has fathered six children (Burt, Cassandra, Brandon, Brody, Kendall and Kylie Jenner) and raised four stepchildren (Kourtney, Kim, Khloe and Rob Kardashian). He and Kris Jenner filed for divorce Sept. 22, after more than two decades of marriage, and nailed down the terms of their split in December. As of last month, they were free agents once again.

A look at the former Olympic athlete through the years.

Rumors of his gender transition -- and the Sawyer interview, and a possible TV series documenting his journey -- reached a peak in early February when he was featured on the cover of People. According to the magazine, at that point he'd already told his family of his plans.

Still, as recently as October, Kris Jenner had called the sex-change rumors "silly" and noted, "They've been saying that since the '70s."

A story quoting Kendall Jenner in a way that appeared to confirm rumors that her dad, Bruce Jenner, is transitioning genders has been retracted and taken down by the outlet that published it Wednesday.